Here's how to have great Saturday-night sex

Confucius once said, "In all things, success depends upon previous preparation." With that in mind, try this plan this weekend.

10 A.M. - Sleep in. On average, adults get fewer than seven hours of sleep on weeknights and just 7.4 hours on weekends. That's bad news for your sex life: According to research, being overtired can dampen libido, cause erection problems in men and make it harder for a woman to orgasm.

3 P.M. - Get some exercise. Hey you don't have to convince me (or most of you for that matter). But with that said, let me tell you why ... working out boosts blood flow to those oh-so-important parts -- which can mean easier arousal and orgasm. In fact, a Canadian study found that a short cardio workout increases blood flow to the vagina by 169 percent.

6 P.M. - Have wine at dinner. But keep it to one (or two) glasses! A little alcohol lowers inhibitions and may increase desire for sex ... but too much just makes you tired.

9 P.M. - Turn off the TV. Italian research found that couples who had a TV in the bedroom had half as much sex as those who didn't. Tell your partner that and see if he or she still wants to catch The Daily Show. Follow this plan and who knows, date night might just blow your mind.